diff --git a/docker-compose.yml b/docker-compose.yml
index f435379..d498c23 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@
 # Distributed under the terms of the Modified BSD License.
 
 # JupyterHub docker-compose configuration file
-version: "2"
+version: "3"
 
 services:
   hub-db: